81198880

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{10357}}^1$

素因数の和:10386

約数の個数: 72

約数和(自身を含む): 223173468

約数和(自身を除く): 141974588

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 3920, 7840, 10357, 20714, 41428, 51785, 72499, 82856, 103570, 144998, 165712, 207140, 289996, 331424, 362495, 414280, 507493, 579992, 724990, 828560, 1014986, 1159984, 1449980, 1657120, 2029972, 2319968, 2537465, 2899960, 4059944, 5074930, 5799920, 8119888, 10149860, 11599840, 16239776, 20299720, 40599440, 81198880]

約数ペア:

[(1, 81198880), (2, 40599440), (4, 20299720), (5, 16239776), (7, 11599840), (8, 10149860), (10, 8119888), (14, 5799920), (16, 5074930), (20, 4059944), (28, 2899960), (32, 2537465), (35, 2319968), (40, 2029972), (49, 1657120), (56, 1449980), (70, 1159984), (80, 1014986), (98, 828560), (112, 724990), (140, 579992), (160, 507493), (196, 414280), (224, 362495), (245, 331424), (280, 289996), (392, 207140), (490, 165712), (560, 144998), (784, 103570), (980, 82856), (1120, 72499), (1568, 51785), (1960, 41428), (3920, 20714), (7840, 10357)]